JP5764635B2 - Locking device - Google Patents

Description

  The present invention relates to a lock device that makes it difficult to duplicate a key and unlock it with a picking tool, and to create a large number of key differences.

  In a lock device called a cylinder lock, a plug is rotatably accommodated in a cylinder case, and the plug is non-rotatably restrained with respect to the cylinder case by a pin tumbler lock mechanism provided between the cylinder case and the plug. By inserting a key plate into the keyhole of the plug, the pin tumbler lock mechanism is operated in the restraint releasing direction. Such a locking device can relatively easily duplicate the key and can also relatively easily invalidate the pin tumbler locking mechanism using the picking tool. Various lock devices that make unauthorized unlocking by picking difficult have been proposed (for example, Patent Document 1).

JP 2000-352229 A

  SUMMARY OF THE INVENTION An object of the present invention is to provide a lock device that is difficult to duplicate a key and unlocks it with a picking tool and that can create a large number of key differences.

Hereinafter, the present invention will be described with reference to the accompanying drawings, but the present invention is not limited thereto.
The locking device 1 of the present invention for solving the above problems includes a lock 2 and a key 3 for operating the lock 2 to lock and unlock. The lock 2 includes a substantially cylindrical cylinder case 4 and a plug 5 that is inserted therein so as to be rotatable about an axis between a locked position and an unlocked position. The cylinder case 4 has a plurality of driver pin holes 6 extending in the radial direction and opening in the inner peripheral surface 4a. The plug 5 includes a key hole 7 that opens to the front end and forms a key insertion space extending in the axial direction, and a plurality of cord pin holes 8 that penetrate from the outer peripheral surface 5a to the key hole 7 at positions corresponding to the driver pin holes 6. To do. A driver pin 9 is movably inserted into the driver pin hole 6 and is urged toward the inner peripheral surface 4 a of the cylinder case 4. A cord pin 11 is movably inserted into the cord pin hole 8. The key 3 includes a plurality of pin operation units 12. When the key 3 is inserted into the key hole 7 of the lock 2, the pin operation unit 12 contacts the tip of the cord pin 11, and the contact surface between the cord pin 11 and the driver pin 9 coincides with the outer peripheral surface 5 a of the plug 5. By doing so, the plug 5 can be rotated in the unlocking direction. The key hole 7 of the plug 5 includes a front portion 7a having a wide key insertion space and a narrow portion 7c in the back where the key insertion space is narrowed via a step portion 7b with respect to the front portion. The cord pin hole 8 a at the innermost part of the plug 5 and the driver pin hole 6 a at the innermost part of the cylinder case 4 corresponding thereto are arranged at positions corresponding to the narrow part 7 c of the key hole 7. The key body 13 has a wide portion 13a corresponding to the front portion 7a of the keyhole 7, and a narrow portion 13b corresponding to the narrow portion 7c. The pin operation unit 12 located at the forefront of the key 3 includes an operation pin 14. The operation pin 14 is held by the narrow portion 13b of the key body 13 so as to be able to protrude and retract in a direction orthogonal to the insertion direction of the key 3, and when the key 3 is inserted into the key hole 7, the inner surface of the front portion 7 a of the key hole 7. Is in sliding contact with the inner surface of the narrow portion 7c, and when it is aligned with the innermost code pin hole 8a, the tip portion protrudes from the narrow portion 13b of the key body 13 and the innermost code pin 11a. It is urged | biased so that it may contact | abut. When the operation pin 14 comes into contact with the tip of the cord pin 11 a, the cord pin 11 a is pushed so that the contact surface between the cord pin 11 a and the driver pin 9 a coincides with the outer peripheral surface 5 a of the plug 5.

  In the door locking device 1 of the present invention, since the operation pin 14 for operating the code pin 11a is incorporated in the key body 13, it is difficult to duplicate the key. The inner part of the keyhole 7 is narrow, and it is difficult to perform unauthorized unlocking with a picking tool. Numerous key differences can be created by changing the lengths of the operation pin 14 and the corresponding code pin 11a. Since the operation pin 14 is in sliding contact with only the narrow portion 7c at the back of the keyhole 7, there is little wear due to use, and it can withstand long-term use.

It is sectional drawing of the locking device of the state which extracted the key from the lock. It is sectional drawing which shows the unlocking operation of the locking device of FIG. 1 later on. It is sectional drawing which shows the unlocking operation of the locking device of FIG. 1 later on. It is sectional drawing which shows the unlocking operation of the locking device of FIG. 1 later on. It is sectional drawing which shows the unlocking operation of the locking device of FIG. 1 later on. It is sectional drawing which shows the unlocking operation of the locking device of FIG. 1 later on. It is sectional drawing of the key by VII-VII of FIG.

Embodiments of the present invention will be described with reference to the drawings.
The stopper locking device 1 of this embodiment includes a lock 2 and a key 3 for operating the lock 2 to lock and unlock.

  The lock 2 includes a substantially cylindrical cylinder case 4 and a plug 5 that is inserted therein so as to be rotatable about an axis between a locked position and an unlocked position.

  The cylinder case 4 has a plurality of driver pin holes 6 extending in the radial direction and opening in the inner peripheral surface 4a.

  The plug 5 has a key hole 7 that opens at the front end and extends in the axial direction to form a key insertion space, and a plurality of cord pin holes 8 that penetrate from the outer peripheral surface 5a to the key hole 7 at positions corresponding to the driver pin holes 6. It has.

  A driver pin 9 is movably inserted into the driver pin hole 6 of the cylinder case 4 and is urged by a spring 10 toward the inner peripheral surface 4a of the cylinder case.

A cord pin 11 is movably inserted into the cord pin hole 8 of the plug 5.
The key 3 includes a plurality of pin operation units 12. When the key 3 is inserted into the key hole 7 of the lock 2, the pin operation unit 12 abuts against the tip of the cord pin 11 and moves it to the unlocked position, and the contact surface between the cord pin 11 and the driver pin 9. Is aligned with the outer peripheral surface 5a of the plug (the inner peripheral surface 4a of the cylinder case). Thereby, the plug 5 can be rotated in the unlocking direction.

  The key hole 7 of the plug 5 includes a front portion 7a having a wide key insertion space and a narrow portion 7c in the back where the key insertion space is narrowed via a step portion 7b with respect to the front portion.

  The cord pin hole 8 a at the innermost part of the plug 5 and the driver pin hole 6 a at the innermost part of the cylinder case 4 corresponding thereto are arranged at positions corresponding to the narrow part 7 c of the key hole 7.

  The key 3 includes a key body 13 and an operation pin 14. The insertion portion of the key body 13 is formed of a plate-like body having a predetermined thickness and width, and a plurality of pin operation portions 12 that abut on the tip of the cord pin 11 are provided there. The distal end of the operation pin 14 constitutes one pin operation unit 12 a located at the most distal part of the plurality of pin operation units 12.

  The key body 13 has a wide portion 13a corresponding to the front portion 7a of the keyhole and a narrow portion 13b corresponding to the narrow portion 7c. An operation pin hole 15 is formed in the thickness direction of the narrow portion 13b in the width direction (direction orthogonal to the key insertion direction). The operation pin 14 is held in the operation pin hole 15 via a biasing spring 16 such that the tip protrudes from the operation pin hole 15.

  The tip of the operation pin 14 is in a position where it does not protrude from the extension line of the outer edge of the wide portion 13a of the key body. Therefore, when the operation pin 14 is inserted into the keyhole 7, the operation pin 14 does not contact the inner surface of the front portion 7a of the keyhole, reaches the narrow portion 7c and is pushed into the operation pin hole 15, and enters the inner surface of the narrow portion 7c. Make sliding contact. When the operation pin 14 is aligned with the innermost code pin hole 8a, the tip portion protrudes from the narrow portion 13b of the key body and presses the tip of the code pin 11a. The cord pin 11a pushed by the operation pin 14 compresses the spring 10 and moves together with the driver pin 9a to the unlocked position radially outward, so that the contact surface with the driver pin 9a coincides with the outer peripheral surface 4a of the plug 5. .

  Since the lock device 1 has the operation pin 14 incorporated in the key body 13, it is difficult to duplicate the key 2. Since the front portion 7a of the key hole 7 is large, the operation pin 14 does not become an obstacle when the key 3 is inserted. Since the operation pin 14 does not slide on the front portion 7a of the keyhole 7, it is less likely to be worn by use. The inner part of the keyhole 7 is narrow, and it is difficult to perform unauthorized unlocking with a picking tool. Numerous key differences can be created by changing the length of the operation pin 14 and the corresponding code pin 11a.

DESCRIPTION OF SYMBOLS 1 Locking device 2 Lock 3 Key 4 Cylinder case 4a Inner peripheral surface 5 Plug 5a Outer peripheral surface 6 Driver pin hole 6a Innermost driver pin hole 7 Key hole 7a Front part 7b Step part 7c Narrow part 8 Code pin hole 8a Inner part Code pin hole 9 driver pin 9a innermost driver pin 10 spring 11 code pin 11a innermost code pin 12 pin operation part 12a state-of-the-art pin operation part 13 key body 13a wide part 13b narrow part 14 operation pin 15 Operation pin hole 16 Spring

Claims (2)

A lock device comprising a lock and a key for operating the lock to unlock the lock,
The lock includes a substantially cylindrical cylinder case having a plurality of driver pin holes that extend in the radial direction and open to the inner peripheral surface; and the lock is locked in the cylinder case so that the outer peripheral surface is in sliding contact with the inner peripheral surface of the cylinder case. A key hole that is inserted between the position and the unlocked position so as to be rotatable about the axis and that opens to the front end and extends in the axial direction, and penetrates the key hole from the outer peripheral surface at a position corresponding to the driver pin hole A plug having a plurality of cord pin holes; a driver pin that is movably inserted into the driver pin hole and biased toward the inner peripheral surface of the cylinder case; and is movably inserted into the cord pin hole A cord pin,
The key includes a plurality of pin operation portions that come into contact with the tip end of the cord pin so that the contact surface of the cord pin and the driver pin coincides with the outer peripheral surface of the plug when inserted into the keyhole,
The key hole of the plug includes a front portion having a wide key insertion space and a narrow portion at the back where the key insertion space is narrowed via a step portion with respect to the front portion. The pin hole and the corresponding one driver pin hole of the innermost part of the cylinder case are arranged at a position corresponding to the narrow part of the key hole,
The key includes a key body having a wide portion corresponding to a front portion of the keyhole and a narrow portion corresponding to a narrow portion;
The one pin operation part located at the forefront of the key consists of an operation pin held in a narrow part of the key body so as to be able to protrude and retract in a direction perpendicular to the key insertion direction,
When the operation pin is inserted into the keyhole, the operation pin does not come into contact with the inner surface of the front portion of the keyhole, slides into the inner surface of the narrow portion, and fits with the innermost code pin hole. The locking device is characterized in that the portion protrudes from the narrow portion of the key body and is urged so as to contact the tip of the innermost code pin.   The key body is composed of a plate-like body having a predetermined thickness and width, and the operation pin is held via a biasing spring in a pin hole formed in the thickness direction of the key body in the width direction. 2. The locking device according to claim 1, wherein:

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